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Risk factors for long COVID in children and adolescents:a systematic review and meta-analysis

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world Journal of Pediatrics 2024年第2期20卷 133-142页

作者： daniel G.Rayner Elaine wang Cloris su Om D.Patel Stephanie Aleluya Alessandra Giglia Evelyn Zhu Maha Siddique Department of health Research Methods Evidenceand ImpactFaculty of Health SciencesMcMaster University1280 Main St WHamiltonONL8S 4K1Canada Faculty of health Sciences McMaster University1280 Main St WHamiltonON L8S 4K1Canada Faculty of Science McMaster University1280 Main St WHamiltonONL8S 4K1Canada

Background The long-term sequelae of COVID-19 in children and adolescents remain poorly understood and *** systematic review and meta-analysis sought to summarize the risk factors for long COVID in the pediatric *** we searched six databases from January 2020 to May 2023 for observational studies reporting on risk factors for long COVID or persistent symptoms those were present 12 or more weeks post-infection using multivariable regression *** registries,reference lists of included studies,and preprint servers were hand-searched for relevant ***-effects meta-analyses were conducted to pool odds ratios for each risk *** study risk of bias was rated using QUIPS,and the GRADE framework was used to assess the certainty of evidence for each unique *** Sixteen observational studies(N=46,262)were included,and 19 risk factors were amenable to *** moderate certainty in the evidence,age(per 2-year increase),allergic rhinitis,obesity,previous respiratory diseases,hospitalization,severe acute COVID-19,and symptomatic acute COVID-19 are probably associated with an increased risk of long *** sex,asthma,comorbidity,and heart diseases may be associated with an increased risk of long COVID,and Asian and Black races may be associated with a decreased risk of long *** did not observe any credible subgroup effects for any risk *** The current body of literature presents several compelling risk factors for the development of long COVID in the pediatric *** research is necessary to elucidate the pathophysiology of long COVID.

关键词： COVID-19 Long COVID Post-acute COVID-19 syndrome Pediatrics Risk factors

The Emerging Big Data Ecosystem and Digital Transformation of Poverty Governance in China

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Social Sciences in China 2024年第2期45卷 152-183页

作者： wang Zhongyuan su Yun woo daniel Kibler Fudan Institute for Advanced Study in Social Sciences MOE Laboratory for National Development and Intelligent GovernanceFudan UniversityChina Department of Political Science University of TwenteNetherlands Department of Political Science University of ZurichSwitzerland

Big data technology has become increasingly prevalent in facilitating the delivery of government services and public goods in China and *** article seeks to examine how big data can be leveraged in poverty governance in rural China,and what the political implications *** phenomenon of big data-driven welfare governance is particularly salient considering the broader context of governmental digital transformation,both within China and *** research sheds light on how big data usage functions in poverty alleviation,highlighting general motivations and developments in Chinese data-centric welfare *** importantly,this article introduces the novel concept of"digital cybernetic capacity"to examine public sector modernization as big data transforms the landscape of welfare delivery and *** delving into the intersection between technology and social welfare,we explicate how the use of big data in social welfare policies can go beyond merely improving information capacity to redefine state *** article argues that such a new governance ecosystem,driven as it is by data technologies,not only provides insights about the transformative resilience of Chinese governance but also opens a new theoretical frontier for research into other countries.

关键词： big data ecosystem targeted poverty alleviation(TPA) social welfare state capacity China

Effects of longwall-induced stress and deformation on the stability and mechanical integrity of shale gas wells drilled through a longwall abutment pillar

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International Journal of Mining Science and Technology 2017年第1期27卷 115-120页

作者： daniel w.h.su National Institute for Occupational Safety and health Bruceton 15236PAUSA

This paper presents the results of a comprehensive study conducted by CONSOL Energy, Marcellus Shale Coalition, and Pennsylvania Coal Association to evaluate the effects of longwall-induced subsurface deformations on the mechanical integrity of shale gas wells drilled over a longwall abutment *** primary objective is to demonstrate that a properly constructed gas well in a standard longwall abutment pillar can maintain mechanical integrity during and after mining operations. A study site was selected over a southwestern Pennsylvania coal mine, which extracts 457-m-wide longwall faces under about 183 m of cover. Four test wells and four monitoring wells were drilled and installed over a 38-m by84-m centers abutment pillar. In addition to the test wells and monitoring wells, surface subsidence measurements and underground coal pillar pressure measurements were conducted as the 457-m-wide longwall panels on the south and north sides of the abutment pillar were mined by. To evaluate the resulting coal protection casing profile and lateral displacement, three separate 60-arm caliper surveys were conducted. This research represents a very important step and initiative to utilize the knowledge and science obtained from mining research to improve miner and public safety as well as the safety and health of the oil and gas industries.

关键词： Gas well Casing Abutment pillar Stability Safety and health Instrumentation Numerical simulation

Effect of longwall-induced subsurface deformations on shale gas well casing stability under deep covers

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International Journal of Mining Science and Technology 2019年第1期29卷 3-8页

作者： daniel w.h.su Peter Zhang Mark Van Dyke Todd Minoski Center for Disease Control and Prevention(CDC) National Institute for Occupational Safety and Health(NIOSH)Pittsburgh Mining Research Division(PMRD)

This paper presents the results of a 2017 study conducted by the National Institute for Occupational Safety and health(NIOSh), Pittsburgh Mining Research Division(PMRD), to evaluate the effects of longwall-induced subsurface deformations within a longwall abutment pillar under deep cover. The 2017 study was conducted in a southwestern Pennsylvania coal mine, which extracts 457 m-wide longwall panels under 361 m of cover. One 198 m-deep, in-place inclinometer monitoring well was drilled and installed over a 45 m by 84 m center abutment pillar. In addition to the monitoring well, surface subsidence measurements and underground coal pillar pressure measurements were conducted as the 457 m-wide longwall panel on the south side of the abutment pillar was being mined. Prior to the first longwall excavation, a number of simulations using FLAC3D^(TM) were conducted to estimate surface subsidence, increases in underground coal pillar pressure, and subsurface horizontal displacements in the monitoring well. Comparisons of the pre-mining FLAC3D simulation results and the surface, subsurface,and underground instrumentation results show that the measured in-place inclinometer casing deformations are in reasonable agreement with those predicted by the 3D finite difference models. The measured surface subsidence and pillar pressure are in excellent agreement with those predicted by the 3D *** from this 2017 research clearly indicate that, under deep cover, the measured horizontal displacements within the abutment pillar are approximately one order of magnitude smaller than those measured in a 2014 study under medium cover.

关键词： Longwall Deformations Shale gas wells Casing Safety and health

Design of refractory multi-principal-element alloys for high-temperature applications

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npj Computational Materials 2023年第1期9卷 884-893页

作者： Gaoyuan Ouyang Prashant Singh Ranran su Duane D.Johnson Matthew J.Kramer John h.Perepezko Oleg N.Senkov daniel Miracle Jun Cui Division of Materials Science and Engineering Ames LaboratoryAmesIA 50011USA Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWI 53706USA Department of Materials Science and Engineering Iowa State UniversityAmesIA 50011USA Air Force Research Laboratory Materials and Manufacturing DirectorateWright-Patterson Air Force BaseDaytonOH 45433USA

Refractory multi-principal-element alloys(RMPEAs)exhibit high specific strength at elevated temperatures(T).however,current RMPEAs lack a balance of room-temperature(RT)ductility,high-T strength,and high-T creep *** density-functional theory methods,we scanned composition space using four criteria:(1)formation energies for operational stability:-150higher strength found via interstitial electron density with Young’s moduli E>250 GPa;(3)inverse Pugh ratio for ductility:G/Bhigh melting points:T_(m)>2500°*** rapid bulk alloy synthesis and characterization,we validated theory and down-selected promising alloy compositions and discovered Mo72.3w12.8Ta10.0Ti2.5Zr2.5 having well-balanced RT and high-T mechanical *** alloy has comparable high-T compressive strength to well-known MoNbTaw but is more ductile and more creep *** is also superior to a commercial Mo-based refractory alloy and a nickel-based superalloy(haynes-282)with improved high-T tensile strength and creep resistance.

关键词： creep alloy alloys

The current perspective of the PA 1957 gas well pillar study and its implications for longwall gas well pillars

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International Journal of Mining Science and Technology 2021年第1期31卷 117-126页

作者： Peter Zhang daniel su Chris Mark CDC NIOSh Pittsburgh Mining Research DivisionPittsburghPA 15236USA Mine Safety and health Administration PittsburghPA 15217USA

Many states rely upon the Pennsylvania 1957 Gas well Pillar Study to evaluate the coal barrier surrounding gas *** study included 77 gas well failure cases that occurred in the Pittsburgh and Freeport coal seams over a 25-year *** the time,coal was mined using the room-and-pillar mining method with full or partial pillar recovery,and square or rectangle pillars surrounding the gas wells were left to protect the *** study provided guidelines for pillar sizes under different overburden depths up to 213 m(700 ft).The 1957 study has also been used to determine gas well pillar sizes in longwall mines since longwall mining began in the 1970 *** original study was developed for room-and-pillar mining and could be applied to gas wells in longwall chain pillars under shallow ***,under deep cover,severe deformations in gas wells have occurred in longwall chain ***,with a better understanding of coal pillar mechanics,new insight into subsidence movements induced by retreat mining,and advances in numerical modeling,it has become both critically important and feasible to evaluate the adequacy of the 1957 study for longwall gas well *** this paper,the data from the 1957 study is analyzed from a new perspective by considering various factors,including overburden depth,failure location,failure time,pillar safety factor(SF),and floor *** pillar SF and floor pressure are calculated by considering abutment pressure induced by full pillar recovery.A statistical analysis is performed to find correlations between various factors and helps identify the most significant factors for the stability of gas wells influenced by retreat *** analyzing the data from the 1957 study,the guidelines for gas well pillars in the 1957 study are evaluated for their adequacy for roomand-pillar mining and their applicability to longwall *** modeling is used to model the stability of gas wells by quantifying the mining-induced s

关键词： Gas well pillar Pennsylvania 1957 gas well pillar study Room-and-pillar mining Longwall mining

Satellite image analysis using crowdsourcing data for collaborative mapping:current and opportunities

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International Journal of Digital Earth 2020年第6期13卷 645-660页

作者： wei su daniel sui Xiaodong Zhang College of Land Science and Technology China Agricultural UniversityBeijingPeople’s Republic of China Department of Geosciences University of ArkansasFayettevilleARUSA

Researchers are continually finding new applications of satellite images because of the growing number of high-resolution images with wide spatial ***,the cost of these images is sometimes high,and their temporal resolution is relatively *** is an increasingly common source of data that takes advantage of local stakeholder knowledge and that provides a higher frequency of *** complementarity of these two data sources suggests there is great potential for mutually beneficial ***,there are still important gaps in crowdsourced satellite image analysis by means of crowdsourcing in areas such as land cover classification and emergency *** this paper,we summarize recent efforts,and discuss the challenges and prospects of satellite image analysis for geospatial applications using *** can be used to improve satellite image analysis and satellite images can be used to organize crowdsourced efforts for collaborative mapping.

关键词： Satellite image analysis crowdsourcing volunteered geographic

Impact of glacier changes and permafrost distribution on debris flows in Badswat and Shishkat catchments,Northern Pakistan

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Journal of Mountain Science 2023年第12期20卷 3687-3702页

作者： hASSAN wajid su Feng-huan LIU wei-ming hASSAN Javed hASSAN Muzammil BAZAI Nazir Ahmed wANG hao YANG Ze-wen ALI Muzaffar CASTELLANOS daniel Garcia Institute of Mountain hazards and Environment Chinese Academy of SciencesChengdu 610041China China-Pakistan Joint Research Center on Earth Sciences CAS-HECIslamabad 45320Pakistan University of Chinese Academy of Sciences Beijing 100049China DTU Space Technical University of DenmarkKongens Lyngby 2800Denmark Department of Environmental Science Karakoram International UniversityGilgit-Baltistan 15100Pakistan Key Laboratory of Mountain hazards and Earth surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Instituto de Ciencias de la Tierra Jaume Almera ICTJA-CSICSoléi Sabarís s/nBarcelona 08028Spain

Knowledge of glacier changes and associated hazards is of great importance for the safety consideration of the population and infrastructure in the mountainous regions of Upper Indus Basin(UIB).In this study,we assessed the variations in glacier velocity,glacier surface elevation change,meteorological conditions,and permafrost distribution in Badswat and Shishkat catchments located in UIB to access the potential impact on the occurrence of debris flow in both *** find that the glacier surface velocity increased during the debris flow event in the Badswat catchment and the mean daily temperature was 3.7℃to 3.9℃higher in most of the *** enhanced glacier surface elevation lowering period coincide with the rise in temperature during spring and autumn months between 2015 to 2019 in Badswat *** source region of debris flow falls within the lower boundary of permafrost occurrence zone and lies below the 0℃isotherm during late spring and summer *** Shishkat catchment the 0℃isotherm reaches above the debris flow source area during August and the glacier do not show any significant variations in velocity and surface elevation *** debris flow source area is adjacent to the slow-moving rock glacier in Shishkat catchment while in Badswat catchment the debris flow initiated from the former glacier *** catchments are largely glacierized and thus sensitive to changes in climatic conditions and changes in the cryosphere response possess significant threats to the population *** monitoring of cryosphere-climate change in the region can contribute toward the improvement of disaster risk reduction and mitigation policies.

关键词： Cryosphere change Climate change Debris flow Remote sensing Permafrost Cryosphere hazard

The retinal function imager and clinical applications

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Eye and Vision 2018年第1期5卷 191-195页

作者： daniel su sunir Garg The Retina Service of wills Eye hospital Mid Atlantic Retina840 Walnut StreetSuite 1020PhiladelphiaPA 19107USA

Background:The Retinal Function Imager(RFI)provides in vivo and noninvasive imaging of both the retinal structure and ***:The RFI can create capillary perfusion maps,measure blood flow velocity,and determine metabolic function including blood *** can aid clinical diagnosis as well as assess treatment response in several retinal vascular diseases including diabetic *** flow velocity abnormalities have also been implicated in disease such as age-related macular degeneration and require further *** with optical coherence tomography angiography,the RFI produces capillary maps of comparable image quality and wider field of view but it is unable to provide depth-resolved information and has longer image acquisition ***,functional imaging using blood oximetry has limited applications and additional research is ***:The RFI offers noninvasive,high-resolution imaging of retinal microvasculature by creating capillary perfusion *** addition,it is capable of measuring retinal blood velocity directly and performs functional imaging with retinal blood *** clinical applications are broad and additional research with functional imaging may potentially lead to diagnosis of diseases and their progression before anatomic abnormalities become evident,but longer image acquisition times may limit its clinical adoption.

关键词： Retinal function imager Retinal blood flow Blood flow velocity Oximetry Noninvasive imaging Retina